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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 42, Iss. 20 — Jul. 10, 2003
  • pp: 4176–4185

Fourier synthesis image reconstruction by use of one-dimensional position-sensitive detectors

Jun′ichi Kotoku, Kazuo Makishima, Yuu Okada, Hitoshi Negoro, Yukikatsu Terada, Hidehiro Kaneda, and Minoru Oda  »View Author Affiliations


Applied Optics, Vol. 42, Issue 20, pp. 4176-4185 (2003)
http://dx.doi.org/10.1364/AO.42.004176


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Abstract

An improvement of Fourier synthesis optics for hard x-ray imaging is described, and the basic performance of the new optics is confirmed through numerical simulations. The original concept of the Fourier synthesis imager utilizes nonposition-sensitive hard x-ray detectors coupled to individual bigrid modulation collimators. The improved concept employs a one-dimensional position-sensitive detector (such as a CdTe strip detector) instead of the second grid layer of each bigrid modulation collimator. This improves the imaging performance in several respects over the original design. One performance improvement is a two-fold increase in the average transmission, from 1/4 to 1/2. The second merit is that both the sine and cosine components can be derived from a single grid-detector module, and hence the number of imaging modules can be halved. Furthermore, it provides information along the depth direction simultaneously. This in turn enables a three-dimensional imaging hard x-ray microscope for medical diagnostics, incorporating radioactive tracers. A conceptual design of such a microscope is presented, designed to provide a field of view of 4 mm and a spatial resolution of 400 μm.

© 2003 Optical Society of America

OCIS Codes
(070.2580) Fourier optics and signal processing : Paraxial wave optics
(070.2590) Fourier optics and signal processing : ABCD transforms
(100.3010) Image processing : Image reconstruction techniques
(170.6900) Medical optics and biotechnology : Three-dimensional microscopy
(180.7460) Microscopy : X-ray microscopy
(340.7430) X-ray optics : X-ray coded apertures

History
Original Manuscript: January 21, 2003
Revised Manuscript: April 11, 2003
Published: July 10, 2003

Citation
Jun′ichi Kotoku, Kazuo Makishima, Yuu Okada, Hitoshi Negoro, Yukikatsu Terada, Hidehiro Kaneda, and Minoru Oda, "Fourier synthesis image reconstruction by use of one-dimensional position-sensitive detectors," Appl. Opt. 42, 4176-4185 (2003)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-42-20-4176

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